The BAL-550 is a balanced to unbalanced line transformer
designed for operation down to 20 kHz. It also provides galvanic
isolation between input and output.
Three universal binding posts accept the
balanced line (two wires and a shield) from the depth sounder. The
unbalanced and isolated output is a BNC connector.
If you are testing larger sounders, a BAL-550 makes the hook-up easy and
foolproof. The BAL-550 rejects noise pickup and properly loads the
depth sounder's transmitter.
Receiver sensitivity and output voltage
measurements are more accurate using the BAL-550.
This balun is used to connect depth
sounders to the DSTS-4A , DSTS-5A, and DSTS-5A/2C Chirp depth sounder test sets.